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JT9673-AS Schematic ( PDF Datasheet ) - Toshiba Semiconductor

Teilenummer JT9673-AS
Beschreibung LCD Display Stopwatch LSI
Hersteller Toshiba Semiconductor
Logo Toshiba Semiconductor Logo 




Gesamt 12 Seiten
JT9673-AS Datasheet, Funktion
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TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
JT9673-AS
LCD Display Stopwatch LSI
JT9673-AS
This product is a single-chip CMOS LSI for stopwatches capable of directly driving a 7-digit LCD with four signs.
Applications
· Stopwatches
Features
· 32.768 kHz crystal oscillator
· Displays hour, minute, second, and hundredths of seconds
· Four-sign, 7-digit display, 1/3-duty LCD drive
· 5 display modes (RESET, RUN, STOP, LAP, LAP STOP) and optional display modes (NORMAL LAP,
SECTION LAP) are selectable by bonding option.
· Counting by 9 hours, 59 minutes, 59 seconds, 99 hundredths of second (units: 1/100 second)
· Power supply: 1.55 V-single power supply
· Built-in voltage doubler circuit
· Low current consumption (Isup = 3.0 µA max)
Block Diagram
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JT9673-AS Datasheet, Funktion
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JT9673-AS
6. Input Setting
S1, S2, S3: Normally all pulled down to the VSS1 level by IC internal pull-down resistance. S1, S2, and S3
perform their specified functions when connected to the VDD by an external switch.
SL1, SL2, SL3: Normally, all pulled down to the VSS1 level by IC internal pull-down resistance.
Setting the level of the pins externally allows functions to be selected
T1, T2, T3, T4: Normally, all pulled up to the VDD level by IC internal pull-up resistance. Used for IC
testing.
7. Type Selection Function
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SL1 SL2 SL3
Type
0 ¾ ¾ A Type (1/100 seconds display)
1 ¾ ¾ B Type (1/10 seconds display)
¾0
0 C Type
¾1
¾0
0 D Type
1 E Type
See 8. Mode Sequence.
¾1
1 F Type
Note 2: ‘0’ indicates input is OPEN or connect to VSS1.
¾’ indicates don’t care.
8. Mode Sequence
(1) C type
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Starts functioning on the rising edge of S1 and S2
(2) D type
(3) E type
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JT9673-AS pdf, datenblatt
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JT9673-AS
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RESTRICTIONS ON PRODUCT USE
000707EBA
· TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability
Handbook” etc..
· The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer’s own risk.
· The products described in this document are subject to the foreign exchange and foreign trade laws.
· The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.
· The information contained herein is subject to change without notice.
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